Cortical Evoked Potentials and Hearing Aids in Individuals with Auditory Dys-Synchrony

Yuvaraj, Pradeep; Mohan, J.

doi:10.5152/iao.2015.1162

Cited by 3 publications

(3 citation statements)

References 27 publications

(43 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Yuvaraj and Mannarukrishnaiah [ 29 ] investigated the role of cortical potentials on aided performance in 38 individuals with late onset ANSD. Participants with ANSD were grouped into 4 subgroups based on their aided performance.…”

Section: Resultsmentioning

confidence: 99%

Behavioural and Electrophysiological Correlates of Aided Performance in Individuals with Late Onset Auditory Neuropathy Spectrum Disorder: A Review

Mathai

2018

J Audiol Otol

View full text Add to dashboard Cite

Hearing aids are one of the rehabilitative options for individuals with late onset auditory neuropathy spectrum disorder (ANSD). There is a growing body of evidence that supports the effectiveness of hearing aids among these individuals. The objective of the study was to review the behavioural and electrophysiological factors that determine the effectiveness of amplification in individuals with late onset ANSD. An intensive search was carried out using the PubMed, SpringerLink and Google Scholar databases using the following keywords: auditory neuropathy, late onset ANSD, hearing aids and amplification. There were both retrospective and experimental research studies that showed aided improvement in individuals with late onset ANSD. The aided improvement in these studies has been attributed to preserved neural synchrony. Hence, it was concluded that, hearing aids are effective in improving speech perception in a sub-group of individuals with late onset ANSD. Measures that evaluate neural synchrony are promising tools to identify the sub-group of such individuals. Speech identification scores at higher sensation levels and cortical potentials are the two clinical measures that indicate aided performance in individuals with late onset ANSD.

show abstract

Section: Resultsmentioning

confidence: 99%

Behavioural and Electrophysiological Correlates of Aided Performance in Individuals with Late Onset Auditory Neuropathy Spectrum Disorder: A Review

Mathai

2018

J Audiol Otol

View full text Add to dashboard Cite

show abstract

“…Oates, et al [38] reported 1) decreased N2 amplitude in children and adults with sensori-neural hearing loss and furthermore, 2) that the decrease in N2 amplitude was dependent on duration of hearing loss. Extrapolating these findings, Yuvaraj and Mannarukrishnaiah [39] have explained that the lack of, or low representation of acoustic features of sound at the cortical level over a period may be the reason for lower N2 amplitude in individuals with auditory dys-synchrony. Furthermore, the representation or non-representation of sound at the cortical level may not, in itself, be important because N2 amplitude is decreased even in sensori-neural hearing loss.…”

Section: Discussionmentioning

confidence: 97%

“…Furthermore, the representation or non-representation of sound at the cortical level may not, in itself, be important because N2 amplitude is decreased even in sensori-neural hearing loss. It is perhaps the poor representation of the acoustic features of sound stimulus that may be responsible for lower amplitude of N2 in persons with ANSD [39]. …”

Section: Discussionmentioning

confidence: 99%

Audiological Profile of Adult Persons with Auditory Neuropathy Spectrum Disorders

Yuvaraj

Mohan

2016

J Audiol Otol

Self Cite

View full text Add to dashboard Cite

Background and ObjectivesThe auditory profile of a large number of persons with late onset auditory neuropathy spectrum disorder (ANSD) is recently described in the Indian context. The purpose of study was 1) to profile data on routine audiological parameters, cortical evoked potentials, and temporal processing, 2) to analyze the benefit from hearing aids for persons with ANSD, and 3) to understand the association between benefit from hearing aids and auditory profile.Subjects and MethodsThirty-eight adults with late onset ANSD and a matched group of 40 normally hearing adults participated in the study. Basic audiological tests, recording of cortical evoked potentials, and temporal processing tests were carried out on both groups of participant while only persons with ANSD were fitted with hearing aid.ResultsSubjects in the two groups were significantly different on all the audiological parameters. ANSD group seemed to benefit from hearing aids variably. The mean amplitude of N2 was significantly different between normally-hearing participants and patients with ANSD.ConclusionsResidual temporal processing, particularly amplitude modulation detection seems to be associated with benefit from hearing aids in patients with ANSD.

show abstract

Acoustical and Perceptual Analysis of Noise Reduction Strategies in Individuals With Auditory Neuropathy Spectrum Disorders

Jaisinghani¹,

Manjula²

2020

J Speech Lang Hear Res

View full text Add to dashboard Cite

Purpose The conventional amplification devices render minimal or no benefit at abating the speech perception problems of individuals with auditory neuropathy spectrum disorder (ANSD). This study was undertaken to evaluate the effect of noise reduction strategies (multiband spectral subtraction, Wiener-as, Karhunen–Loeve transform [Subspace], and ideal binary mask [IdBM] algorithm) on speech using speech perception measures and acoustic measure among individuals with ANSD. Method Two groups of participants (age: 17–43 years) were recruited in the study. Group I comprised 12 individuals with a confirmed diagnosis of ANSD and not exceeding moderate degree of hearing loss and Group II of 10 individuals with normal hearing in both ears. The signal-to-noise required for 50% speech recognition (SNR-50) was measured for the participants in five conditions, that is, unprocessed speech and speech processed with four noise reduction strategies. Additionally, an acoustic objective measure Extended Short-Time Objective Intelligibility algorithm was employed to estimate the intelligibility index across the conditions. Results Significant difference was found across conditions in both the groups. Pairwise comparison revealed significantly better speech perception on SNR-50 measure with IdBM strategy, for both the groups. No significant difference in SNR-50 was observed with other noise reduction strategies. IdBM condition also gave the highest intelligibility index ( d ) values using Extended Short-Time Objective Intelligibility algorithm. This finding needs to be verified on a larger group of individuals with ANSD. Conclusions IdBM noise reduction strategy rendered significantly lower SNR-50 compared to other noise reduction strategies for individuals with ANSD in this study. This provides clinical evidence for the same and also recommends trying on a larger group of participants before its implementation in hearing devices. Apart from this, the current strategies used in hearing aids provide no improvement in speech identification in noise for this population. Hence, though the present hearing aids may show benefit in quiet condition, chances of its rejection are high in noisy backgrounds.

show abstract

Cortical Evoked Potentials and Hearing Aids in Individuals with Auditory Dys-Synchrony

Cited by 3 publications

References 27 publications

Behavioural and Electrophysiological Correlates of Aided Performance in Individuals with Late Onset Auditory Neuropathy Spectrum Disorder: A Review

Behavioural and Electrophysiological Correlates of Aided Performance in Individuals with Late Onset Auditory Neuropathy Spectrum Disorder: A Review

Audiological Profile of Adult Persons with Auditory Neuropathy Spectrum Disorders

Acoustical and Perceptual Analysis of Noise Reduction Strategies in Individuals With Auditory Neuropathy Spectrum Disorders

Contact Info

Product

Resources

About